The Atmosphere (Edexcel GCSE Chemistry): Flashcards
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How long has the modern atmosphere existed in its current form?
How long has the modern atmosphere existed in its current form?
~200 million years
% of atmosphere that is nitrogen ()
% of atmosphere that is nitrogen ()
Almost 80%
Most abundant gas in atmosphere
Most abundant gas in atmosphere
Nitrogen ()
% of atmosphere that is oxygen ()
% of atmosphere that is oxygen ()
About 20%
Role of oxygen in living organisms
Role of oxygen in living organisms
Crucial for respiration
Definition of trace gases
Definition of trace gases
Gases present in proportions of less than 1%
Example of trace gas (water)
Example of trace gas (water)
Water vapour ()
Example of trace gas (carbon)
Example of trace gas (carbon)
Carbon dioxide ()
Example type of trace gas (inert)
Example type of trace gas (inert)
Noble gases (e.g., argon)
Roles of trace gases in environment
Roles of trace gases in environment
Climate regulation, greenhouse effect, chemical reactions
Stability of atmospheric gas proportions
Stability of atmospheric gas proportions
Relatively stable for ~200 million years